Nailing-machine



(NOMOdelJ I-I, P. FAIRFIELD Nalng Mahine.

No. 230,624. Patented Aug. 3,1880.

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`Uilm Emlwl, www ldwmf s E WM E UNITED STATES HADLEY P. FAIRFIELD, or wEsT MED EoED,AssIeNoE To eoEDoN MGKAY,

TRUSTEE, OF CAMBRIDGE, MASSACHUSETTS.

NAlLlNG-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 230,624, dated August 3, 1880.

Application iiled June 7, 1880. (No model.)

To all whom it may concern:

Be it known that LHADLEY P. FAIRFIELD, of West Medford, county of Middlesex, State of Massachusetts, have invented an Improvement in Nailing-Machines, of which the following description, in connection with the accompanying drawings, is a specilication.

This invention relates to improvements in nailing-machines, ehieily designed for driving 1o nails of the string-nail class in the manufacture of boots and shoes, and for leather-work in general.

My invention, among other things, consists in the combination, with the reel that holds the string-nails, of a spring take-oft' and a yielding nail-support for the 'string-nails, the support being located between the reel and the guide bar or rod through which the nailslring is led; also, in the combination, with 2c the driver-bar, ot' a driver having an angular shank, whereby the driver is thrown to one side of the center of the driving-bar, as hereinafter described; also, in the combination, with the driver and driver-bar and nose, of an z 5 adjustable conical sleeve within which are placed the nose and driver, the said sleeve, by au inclined surface thereon, acting to force the driver toward the nose as the driver descends, to thereby cut the string-nail as it is 3o driven below the nose; also, in the combina tion, with the driver-bar, of a friction device composed of a screw, a spring, and frictionplate, as hereinafter described.

Figure l represents, in side elevation and 3 5 partially in section,a nailing-machine containing my invention; Fig. 2,' a top view, the reel being in section; Fig. 3, a detail, showing the lower end of the nail-driver with the driver fully down; Fig. 4, a section on the dotted 4o line m x, Fig. 3; and Fig. 5 a detail to be referred to.

The frame-work A, made hollow to receive the driver-bar a and a spring, b, of usual construction, by which to lift the driver-bar after each descent, all as usual, has formed as part of it an arm, a2, that carries a stud, c.' On this stud is placed a washer, o2, preferably of leather, then an arm, d, and then a sleeve or hub, c3, upon which is placed the usual reel m 5o for the coil of string-nails, the said reel being held in place thereon by the nut o4, a spring,

o5, controlled by a nut, c, regulating the friction necessary to be overcome to turn the said reel.` The arm d, made adjustable in the are of a circle about the stud c, is extended above this reel, and serves to hold a spring take-off and a yielding nail -support The take-oft' spring d2 is extended down at the rear of the ree1,while the yielding support d3 is extended down in front of the reel almost to the upper 6o end of the usual rod e, grooved to receive and guide the nail-string, the said rod at its lower end serving as the nose of the apparatus.

i have herein shown the take-off d? and support as made in one piece, attached nearly centrally to the adjustable arm d; but it is obvious they might be separate pieces. lf the support cl3 should be omitted then the arm d would be turned forward on the stud o nearer the driver-bar, so that when the reel is full the 7o nail-stringV will not .descend and touch the nail-string on the reel and become broken.

In Fig. 1 the dotted line f shows the position of the nail string. It leaves the reel, passes through the eye 2 of the end of the 75 spring take-olf cl2, thence along over the said takeoff through the eye 3, and down over the free end of the yielding support d3 into the groove or passage e2 of the rod e, and along down iu the said groove and into nosef, as 8o seen in Fig. 1.

The take-off d2 acts to loosen the string of nails from the reel as it is to be delivered, and prevents the injurious drawing together of the coils of nail-string as the driver-bar, being 8 5 thrown or driven down quickly, jerks upon the said nail-string. The support d3 yields to this sudden pull on the stringnails,'and prevents breaking it. The take-oft' and support insure a uniform let-oft' and delivery of the string of 9o nails, notwithstanding variation in the size ofthe coil of'string-nails or the quantity of string-nails on the said reel..

The eXtreme lower end of the nose f is pro- 'vided with a shoulder, f2, to furnish the sta- 95 tionary member of a cutter, the movable member being the edge gz of the driver g, it having a shank, g3, placed in an angular position with relation tothe central line of the driverI g, so that the .said shank g3, placed centrally inthe 10o driver-bar, will canse the driver to be moved in the proper direction with relation to the face .t2 of the said nose.

The frame A has in it two stop-pins, 8 9, each of which enters a slot, 10, in the driverbar a.. The pin 8 acts as a down-stop and the pin 9 as an up -stop for the driver-bar. These two pins, to receive much of the blow or impact of the driver-bar at each ascent and descent thereof, make the apparatus stronger and more durable than when but one stop-pin is used.

Attached adjustably to the rod e is the conical sleeve It. This sleeve is siotted to receive the screw h2, by which to hold the sleeve in position.

The adjusting-screw h3, having, as herein shown, a conical point, enters a conical or other recess (see Fig. l) having an inclined surface, against which the end of the said screw h3 may act to lift or raise the said sleeve. This sleeve receives within it the rod e and nose, and also the driver g, and as the latter descends its rearwardly-inclined face acts upon the conical sleeveand causes the driver, as it reaches the end of its downstroke, to move a little laterally, sutieiently so to cause the nail to be severed between the cutting-edgesf2 g2. The stud fi connects the shank g3 of the driver with the driver-bar.

rihe nose, except at the groove which contains the nail-string, has a hat face to receive the correspondingly flat face of the driver, it being also grooved centrally.

To obviate this I have placed the detentspring so as to bear upon the head of' that nail next back of the one to be driven, thus giving the driver an opportunity to engage the whole of' the head of the nail and drive it with greater accuracy.

The driveris restricted as to the freedom of its movements by the friction-pad m and spring m2 and tubular screw m3, set into the frame A, which presses the driver against the stringwire, thus insuring its engagement with the head of the nail.

I claiml. In a nailing-machine, the combination, with the reel and arm d, of the take-oft' spring cl2, to operate upon the wire nail-string, substantially as described.

2. In a nailing-machine, the combination, with the reel, the wire nail-strip g, and the rod e, of the yielding support d3, located between the reel and the said rod, to operate substantially as described.

3. The combination, with the frame and its two pins, 8 9, of thc slotted driver-bar, substantially as described.

4. The string-nail-guiding rod e and its connected conical sleeve It, combined with the driver placed within the said sleeve and moved or forced by the said sleeve against or toward the clVoting-edgeyLIZ to sever the nail just as it is driven by the driver, substantially as described.

5. The combination, with the driver-bar and frame A, of the screw m3, sprin g m2, and washer m, substantially as described.

In testimony` whereof Ihave signed my name to this specification in the presence ot' two sub scribing witnesses.

HADLEY P. FAIRFIELD.

Witnesses:

G. W. GREGORY, N. E. C. WHITNEY. 

